Hauv photopolymer additive manufacturing technology, 3D resin, ua cov khoom tseem ceeb rau kev ua tiav siab -precision, siab-sov- zoo molding, hauv paus nyob ntawm cov qauv molecular thiab synergistic los ntawm nws cov khoom. Chemically, 3D resin feem ntau muaj peb pawg ntawm cov khoom: matrix resin, photoinitiator, thiab functional additives. Txhua pawg ua lub luag haujlwm tseem ceeb hauv kev kho tus cwj pwm, cov khoom siv kho tshuab, cov txheej txheem hloov tau, thiab kev nyab xeeb hauv kev siv.
Lub matrix resin yog lub hauv paus tseem ceeb ntawm 3D resin, txiav txim siab cov khoom ntawm cov khoom siv lub cev thiab lub cev pob txha ntawm cov pwm. Feem ntau siv matrix resins suav nrog epoxy acrylates, polyurethane acrylates, polyester acrylates, thiab vinyl ether acrylates. Epoxy acrylates muaj siab hardness thiab gloss, thiab ceev ceev curing ceev, ua rau lawv haum rau cov qauv tsim nrog siab xav tau rau cov tsos thiab qhov tseeb. Polyurethane acrylates qhia cov ntu hloov tau yooj yim, txhim kho kev cuam tshuam thiab kev ua haujlwm zoo, ua rau lawv tsim nyog rau qhov chaw ua haujlwm thiab cov ntawv thov uas yuav tsum tau ua kom rov ua haujlwm dua. Polyester acrylates tawm tsam qhov sib npaug ntawm viscosity thiab tus nqi, thaum tseem muab qee qhov kev ua kom tawv thiab tshuaj lom neeg. Qhov hnyav molecular thiab kev faib tawm ntawm lub hauv paus cob cuam tshuam rau nws cov viscosity, curing shrinkage, thiab interlayer bonding zog; Yog li ntawd, kev xaiv meej raws li lub hom phiaj ntawm daim ntawv thov yog qhov tseem ceeb hauv kev tsim qauv.
Photoinitiators yog lub luag haujlwm tseem ceeb hauv kev ua tiav photocuring. Lawv lub luag haujlwm yog tsim kom muaj cov dawb radicals lossis cations nyob rau hauv lub wavelengths ntawm ultraviolet los yog pom lub teeb irradiation, pib ua ob daim ntawv cog lus polymerization ntawm monomers thiab resin. Feem ntau siv cov dawb radical photoinitiators suav nrog 1173 (2-hydroxy-2-methyl-1-phenylpropanone), 819 (phenylbis (2,4,6-trimethylbenzoyl) phosphine oxide), thiab TPO (2,4,6-trimethylbenzoyl-diphenylphosphine). Qhov kev nqus siab siab thiab kev ua haujlwm sib txawv ntawm cov neeg pib sib txawv txiav txim siab txog hom teeb pom kev zoo thiab cov xwm txheej raug tsim nyog rau cov resin. Cationic photoinitiators feem ntau yog siv nyob rau hauv epoxy resin systems, ua tiav kev sib sib zog nqus curing thiab shrinkage tsawg, tab sis nrog ib tug kuj qeeb curing tus nqi. Tus nqi thiab hom photoinitiator yuav tsum tau sib phim nrog kev ua haujlwm ntawm lub hauv paus cob; Kev siv ntau dhau tsis tsuas yog nce nqi xwb tab sis kuj tseem tuaj yeem ua rau yellowing lossis tsw tsw.
Txawm hais tias cov khoom siv ntxiv ua ib feem me me ntawm cov resin, lawv ua lub luag haujlwm tseem ceeb hauv kev tswj cov txheej txheem kev ua tau zoo thiab cov khoom tiav tiav. Leveling agents txhim kho cov uniformity ntawm resin kis rau ntawm molding nto, txo interlayer streaks thiab txiv kab ntxwv tev los; defoamers pab cuam tshuam cov npuas tsim thaum sib xyaw thiab luam ntawv, txo qhov tsis xws ntawm qhov pinhole; polymerization inhibitors ncua lub neej txee thiab tiv thaiv qeeb polymerization ntawm resin nyob rau hauv qhov tsaus ntuj; toughening agents thiab elastomer microparticles txhim kho kev cuam tshuam thiab elongation thaum so; Cov tshuaj tiv thaiv tshav kub thiab cov tshuaj tiv thaiv UV feem ntau ua rau kub kub distortion thiab ncua UV aging thiab yellowing. Tsis tas li ntawd, rau cov ntawv thov tshwj xeeb, cov khoom siv hluav taws xob, cov khoom siv tshuaj tua kab mob, lossis cov tshuaj ntxuav tau hloov pauv tau tuaj yeem qhia rau kev siv tshuaj tiv thaiv kab mob, tshuaj tua kab mob, lossis dej- soluble tu lub luag haujlwm rau cov resin.
Kev sib raug zoo thiab kev sib koom ua ke ntawm peb hom ntawm cov khoom no yuav tsum sib npaug hauv kev tsim qauv. Lub matrix resin muab cov qauv kev txhawb nqa, lub photoinitiator txiav txim siab curing efficiency thiab qhov tob, thiab cov khoom siv additives optimize lub qhov rais txheej txheem thiab cov khoom tiav. Ib qho dhau los lossis tsis muaj peev xwm ntawm ib qho kev tivthaiv tuaj yeem ua rau muaj qhov txawv txav tsis zoo, kho tsis tiav, shrinkage thiab warping, lossis txo cov kav ntev. Yog li ntawd, cov tuam txhab lag luam feem ntau siv kev tswj xyuas kom zoo, ua tib zoo kho cov khoom sib piv raws li lub hom phiaj kev siv, thiab txheeb xyuas cov qauv tsim tau los ntawm qhov me me - teev luam ntawv thiab kev ntsuas kev ua haujlwm.
Zuag qhia tag nrho, lub ntsiab Cheebtsam ntawm 3D resins tsim ib tug heev synergistic tshuaj system. Lub matrix resin nteg lub hauv paus rau kev ua tau zoo, photoinitiators tsav cov tshuaj tiv thaiv kab mob, thiab cov khoom siv ntxiv ua kom zoo dua cov txheej txheem thiab kev ua haujlwm. Kev nkag siab tob txog cov txheej txheem ntawm kev nqis tes ua thiab kev sib cuam tshuam ntawm cov khoom siv no tsis yog tsuas yog pab hauv kev xaiv cov khoom siv thiab kev ua kom zoo dua qub, tab sis kuj tseem muab kev txhawb nqa theoretical thiab cov lus qhia ua tau zoo rau kev tshawb fawb thiab kev tsim cov tshiab resins thiab lawv cov kev ua haujlwm siab -.
